High Availability

ALSO CALLED:
Highly Available Computing,
Data Availability,
HA,
High-availability,
AvailabilityDEFINITION: Data availability is a term used by some computer storage manufacturers and storage service providers (SSPs) to describe products and services that ensure that data continues to be available at a required level of performance in situations ranging from normal through "disastrous." In general, data availability is achieved through redundancy involving where the data is stored and how it can be reached.
Definition continues below.

EGUIDE:
Application security plays an important role in ensuring the accuracy and confidentiality of data, yet at times teams may fear that security can interfere with overall performance. Read this e-book for tips that discuss the value of application security and explain how to implement it to ensure the highest availability and usability.

WHITE PAPER:
This paper examines the top 5 VDI considerations from an SMB point of view, recognizing the unique resource and budget constraints, and compare approaches that will help you select the best solution for your organization. View now to explore how you can cut operational costs and improve worker productivity by implementing virtual desktops.

EBOOK:
Read this e-book to learn how to fully automate the management of all SAP components and related products running on z/OS, AIX®, or Linux®. The automation software monitors all resources and controls the restart and/or takeover of failing components, thereby ensuring near continuous availability of the SAP system.

WHITE PAPER:
This white paper reveals key factors to consider when selecting a server and explains why more and more organizations are relying on x86 platforms. Access key findings from your peers concerning their spending on servers, power and cooling expenses, and more.

WHITE PAPER:
This paper reports on efficient configurations for Virtual Desktops (VDs) which reduce the total hardware cost and improve the storage infrastructure. Check it out to learn more about topics, including virtualisation, optimisation, and high availability.

WHITE PAPER:
This white paper discusses four goals that companies must strive to meet and highlights a Web application delivery controller that can assist them in the process. Access a comprehensive overview of this technology and its key benefits.

WHITE PAPER:
Caritas Christi Health Care used an information system to manage patient information, but its legacy hardware put the organization at risk of downtime, and the high-maintenance systems could no longer support growth. Find out how the healthcare facility selected an IT infrastructure that allowed for greater availability and EHR implementation.

VIDEOCAST:
Are you looking for a cost-effective solution that will integrate your IT infrastructure and data centers, and that will manage information intelligently? Watch this series of videocasts to learn about the Raleigh Leadership Data Center, a state-of-the-art facility built and managed for flexible growth and unpredictable computing demands.

WHITE PAPER:
This white paper provides insight into the relationship between service management and performance. Discover the key attributes of service excellence and the results you can achieve by implementing a lifecycle-based approach.

WHITE PAPER:
The paper includes calculations showing the cost of downtime expected for a given level of EHR solution uptime in practices of various sizes, as well as products associated with specific uptime levels. The report also includes a “cost per hour” tool that estimates the financial impact of downtime in practices they administer, oversee or assist.

WHITE PAPER:
SMBs want to take advantage of the benefits of virtualization but it can be costly to manage if they do not have the required skills in-house. Dan Kusnetzky takes a deep look at all of the benefits as well as the issues these businesses are facing, including the requirement to use automated systems, reducing complexity and maintaining availability.

DATA SHEET:
How your organization handles planned and unplanned email outages can mean the difference between business-as-usual and serious damage to your overall productivity, profitability and reputation. This data sheet describes how IBM can help you protect, archive and manage your mission-critical data and applications.

PRODUCT OVERVIEW:
This solution brief provides a reference architecture to help clients navigate their virtualization projects. Discover a recommended configuration that delivers high performance, consolidation ratios, and availability to support your business-critical applications.

WHITE PAPER:
This paper proposes several sample virtualisation architectures based on Dell's server and storage products. Architectures are divided into three main categories: Small, Medium, and Large. These categories are based on the features and capacity of each product, as well as the complexity of the overall architecture.

EGUIDE:
The Storage Networking Industry Association (SNIA) defines CDP as "a class of mechanisms that continuously capture or track data modifications enabling recovery to previous points in time." In part two of this tutorial on continuous data protection backup, learn how CDP is being used today, and about the latest CDP products.

PRESENTATION TRANSCRIPT:
Server virtualization has many benefits from the disaster recovery standpoint- not having to purchase physical infrastructure for DR being only the tip of the iceberg. Check out this brief, two page transcript of an interview with DR expert Pierre Dorion to learn more about potential benefits and pitfalls of server virtualization in DR.

RESOURCE CENTER:
Tomorrow’s leaders will be organizations that leverage technology to capitalize on rather than simply adapt to changing customer expectations.Access this white paper and find the three major business intelligence trends that are shaping the next generation of successful enterprises.

EGUIDE:
Microsoft Exchange Server is one of the most mission-critical IT services for enterprises, and can mean major headaches when mail servers are down. Learn how to select and verify a hypervisor to avoid common high availability mistakes.

WHITE PAPER:
Email, voicemail, instant messaging, social networking, messages, faxes, shared calendars, and centralized contacts are all essential for boosting productivity and collaboration. Email has evolved from more than just text. Many would find the situation daunting, but smart organizations know the solution. Read this white paper to learn more.

WHITE PAPER:
Instead of regurgitating an architecture where costly, centralized controllers are needed, Aerohive followed the original intent of the 802.11 standard designers more closely and brought the technology to maturity. This paper explores how inter-AP protocols can execute the same functions performed by centralized controllers with lower cost.

HIGH AVAILABILITY DEFINITION (continued): Some vendors describe the need to have a data center and a storage-centric rather than a server-centric philosophy and environment.In large enterprise computer systems, computers typically access data over high-speed optical fiber connection to storage devices. Among the best-known systems for access are ESCON and Fibre Channel. Storage devices often are controlled as a redundant array of independent disks (RAID). Flexibility for adding and reconfiguring a storage system as well as automatically switching to a backup or failover environment is provided by a programmable or manually-controlled High Availability definition sponsored by SearchStorage.com, powered by WhatIs.com an online computer dictionary

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